- 1. [Amps] Source GU-84B fil xfmr (score: 1)
- Author: "Roy" <royanjoy@ncn.net>
- Date: Thu, 14 Jan 2010 19:35:46 -0600
- FYI all, RFP part #F-41X for $9.95 each, is rated 26.5 volts @ 2 amps with 120 VAC on primary. I purchased two and connected primaries in series with secondaries in parallel. My 247 VAC line yields 2
- /archives//html/Amps/2010-01/msg00188.html (6,861 bytes)
- 2. Re: [Amps] Source GU-84B fil xfmr (score: 1)
- Author: texasrf@aol.com
- Date: Thu, 14 Jan 2010 21:06:53 EST
- Roy, even though no inrush protection is called for, it can't hurt anything. Over a 35 year period of using an 8877 on 2m EME I have lost two tubes; both had an open heater. I have to believe a surge
- /archives//html/Amps/2010-01/msg00192.html (7,939 bytes)
- 3. Re: [Amps] Source GU-84B fil xfmr (score: 1)
- Author: James Colville <jimw7ry@gmail.com>
- Date: Thu, 14 Jan 2010 18:19:39 -0800
- Here's what I do. Use a transformer with higher filament voltage than needed. Then put a 100 to 150 Ohm 12.5 watt rheostat (pot) in series with the primary. Set the desired filament voltage with the
- /archives//html/Amps/2010-01/msg00193.html (9,384 bytes)
- 4. Re: [Amps] Source GU-84B fil xfmr (score: 1)
- Author: Roger <sub1@rogerhalstead.com>
- Date: Thu, 14 Jan 2010 21:59:34 -0500
- I doubt a soft start would hurt anything. Operating current is 4A at 26.5 volts which might have an inrush current a bit on the high side. I'm assuming Emtron uses a soft start on their GU-84B as the
- /archives//html/Amps/2010-01/msg00195.html (9,263 bytes)
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